Leaellynasaura

Taxobox
name = "Leaellynasaura"
fossil_range = Early Cretaceous

---

regnum = Animalia
phylum = Chordata
classis = Sauropsida
superordo = Dinosauria
ordo = Ornithischia
subordo = Cerapoda
infraordo = Ornithopoda
familia = Hypsilophodontidae
genus = "Leaellynasaura"
binomial = "Leaellynasaura amicagraphica"
binomial_authority = Rich & Rich, 1989

"Leaellynasaura" was a small herbivorous ornithopod dinosaur of about 60-90 cm in length from the earliest Cretaceous, first discovered in Dinosaur Cove, Australia. Strangely enough, at this period in time, Victoria would have been well within the Antarctic Circle, which is now very cold. This means that "Leaellynasaura" was living and apparently thriving much further south than any reptile could today. This is particularly relevant due to "Cryolophosaurus" being discovered in Antarctica, thus further suggesting the idea that dinosaurs could live under conditions which were once thought unsuitable for their kind. It is possible that the sun would not have risen for several weeks or months in the winter, depending on latitude, which means that "Leaellynasaura" would have had to live in the dark for perhaps months at a time. This is particularly relevant to the fact that "Leaellynosaura" had very big eyes and its brain had large optic lobes, as if it had evolved to be routinely active in the dark. Regardless, the fact that it lived in extremely cold temperatures led many scientists to believe that "Leaellynasaura" was warm-blooded.

The type species is "Leaellynasaura amicagraphica". It was described in 1989. It was named after Leaellyn Rich, the daughter of the palaeontologist couple Tom Rich and Patricia Vickers-Rich who discovered it. "Leaellynasaura" was a hypsilophodont, a rather basal ornithopod. Like all ornithopods, it was a herbivore.

No complete skeletons have been found of "Leaellynasaura". It stood at about one metre (3 feet).

In popular culture

"Leaellynasaura" appeared on the fifth episode of "Walking with Dinosaurs".

Evolved cold-weather "Leaellynasaura" appeared in Stephen Baxter's "Evolution" in the chapter "The Last Burrow."

References

* http://www.users.qwest.net/~jstweet1/ornithopoda.htm
* Rich, T. and Rich, P. , 1988, “Polar dinosaurs and biotas of the Early Cretaceous of southeastern Australia”, National Geographic Research, 5(1) 1989, 15-53 (1988).